5.75" Diffused Downstem, 8-Slit Borosilicate Glass - Product Specifications
 
Length: 5.75 inches / 14.5 cm
Universal length for Castle Glassworks beaker bongs and similar sized bongs
Properly sized to reach the water in the beaker base without being too long
Low-cut perc sits perfectly in your bong's base for ideal water immersion
Important measurement if you need a replacement - measure your current downstem first
Proportional length ensures optimal bubble action and filtration
 
Joint Size: 14mm Female / 19mm Male
19mm Male end inserts into your bong's female joint
14mm Female end receives your bowl
Universal sizing makes it compatible with most standard setups
Male end goes in, female end goes around - remember it this way
 
Diffusion: 8-Slit Design
Eight precision-cut slits at the bottom of the downstem
Each slit breaks smoke into multiple smaller bubbles
More slits = more surface area = better filtration
Maximizes air-to-water contact to filter out heat and harshness
Creates cooler, smoother hits that are gentler on throat and lungs
 
Material: Colored Borosilicate Glass
Premium borosilicate glass known for strength and heat resistance
Available in multiple vibrant colors (purple, green, blue, pink, grey, etc.)
 
Joint Collar: Thickened & Reinforced
Extra-thick glass at the joint connection point
Adds durability where it matters most (common breakage area)
Prevents cracking at the stress point where downstem meets bong
 
Logo: Heat-Bonded Castle Branding
Castle Glassworks logo is heat-bonded to the glass
Won't fade, peel, or wear off with regular use and cleaning
 
Percolator Design: Low-Cut Placement
Slits positioned low on the downstem for proper water immersion
Better smoke-to-water contact than high-positioned percs
 
Water Level Guidelines:
Ensure all eight slits are fully submerged in water
Aim for about 1 inch of water above the slits
Avoid overfilling - too much water causes splash-back
Too little water means some slits won't diffuse properly
Proper water level is key to optimal performance
 
Compatibility:
Universal Fit: Compatible with all Castle Glassworks beakers and accessories
Compatible with carbon filters and ash catchers (check joint sizes)
 
Cleaning & Maintenance:
Soak in glass cleaning solution
Use pipe cleaners to clean out the eight slits
Rinse thoroughly with warm water
Regular cleaning prevents buildup in slits
 
Why These Specs Matter: This isn't just any downstem - it's a serious filtration upgrade. If you're still using an open-ended downstem, this upgrade will transform your smoking experience, you'll immediately notice the difference in smoothness and coolness!