The aluminum blast gate has a guillotine-like close - with a slot that lets air into the system. This prevents sawdust build up.
BlackJack
BlackJack WKS-13032 4in Blast Gate Alum
SKU:
WKS-13032
$19.99
- STOCK:
- E - 0 | V - -1 / SSE - 3 | SSV - 3