door spring for midmark - ritter mis076 replacement parts industries rpi features * 2 per package * stainless steel * note: (2) springs makes it easier to open chamber door * also available in sterilizer pm kits ( mik072 or mik080) fits: chamber model(s) this part fits: m11, m11d, m9, m9d notes: service tip: install (2) springs to help in door opening process.