1) Sanitary level 2) Used in milk, beverage, water treatment. 3) Polish both outside and inside 4) Stainless steel SUS304 We produce the following sized quick elbows:DN20, 25, 32, 40, 50, 65, 80, 90, 100Stainless steel quick elbow (unit: mm)DNSizeDAB200.75"2049.528251"255533.5321.25"326543.5401.5"387048.5502"518260.5652.5"63.510583.5803"76.111088.5903.5"88.912598.51004"106.1155127