MacKeen Premature Infant II Self Retaining Retractor Small Overall Length 1 1/2" (40mm) With Round Wire Blades, On Blade 5mm With The Other Blade Offset With A 3mm Blade To Go Into The 5mm Speculum Designed With 1/2 C Wing Grips To Eliminate Slippage Newly Added V Designed Rounded Wire Spring Which Creates A Stronger But Easier To Use Speculum Designed For The Clarity MSI Ret Cam