Image Item No. Description  4692  Pneumatic Distribution Block 2 x 4 with Non-return Valve Catalog: Parts: Pneumatic  4694c01  Pneumatic Switch with Top Studs Catalog: Parts: Pneumatic  4694c01pb02  Pneumatic Switch with Top Studs with Arm Lever Control Pattern (Sticker) - Set 8443 Catalog: Parts: Pneumatic  4694c01pb03  Pneumatic Switch with Top Studs with Arm Lever Control Pattern (Sticker) - Set 8868 Catalog: Parts: Pneumatic  4694c01pb01  Pneumatic Switch with Top Studs with Grabber Lever Control Pattern (Sticker) - Set 8443 Catalog: Parts: Pneumatic  4697a  Pneumatic T Piece First Version (T Bar) Catalog: Parts: Pneumatic  4697b  Pneumatic T Piece Second Version (T Bar with Ball in Center) Catalog: Parts: Pneumatic