... your pump by reducing wear and tear.1. Polyether and polyester) aperture 15ppi,20ppi,25ppi,30ppi,35ppi,40ppi. 2. black, ... by demend 4. Sponge hole rate of more than 99%, polyester-based foam has excellent oil resistance, wear-resistance performance. 5. reasonable ... size pumps300x120x120mm suits most medium size pumps450x160x160mm suits most large size pumpsPacking 1pc per PE bagwith card is available ...