New Ryco Hydraulic Air Breather Filter R356-16: 1" BSPTRYCO R300 Series Air Breather Filters are designed for installation on the oil reservoir, to filter contaminants from the air as it leaves and enters the reservoir due to changes in oil level as the system operates. RYCO Air Breathers are installed on the top of the oil reservoir. BSPT threaded should be installed with thread tape or thread sealant. BSPP threaded should be installed with RL21 Bonded Seal. BSPT threaded should be installed with thread tape or thread sealant.Specifications:Part No: R356-16 / A5Thread A inch: 1 BSPTNom.Filt Micron: 27Displacement LPM: 1500Diameter D (mm): 137Overall Height B (mm): 155Clearance C (mm): 14A/F Hex (mm): 35Weight(kg):.