I’ve been looking for autoclavable anti-back flow couplers for a while, these work great
4" Thru Counter Waste Chute
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Thru counter waste chute with 4" diameter opening. Keep Sharps and other biohazardous waste off the counters and out of site. Easily replace disposal bags when full.
Includes: 4" biohazard lid and bag holder.
Dimensions: 6" L X 4-1/8" inner diameter X 5-3/4" outer diameter.
Replacement Accessories:
Thru counter waste chute with 4" diameter opening. Keep Sharps and other biohazardous waste off the counters and out of site. Easily replace disposal bags when full.
Includes: 4" biohazard lid and bag holder.
Dimensions: 6" L X 4-1/8" inner diameter X 5-3/4" outer diameter.
Replacement Accessories: